It was quite ___accident that I met him; he was homeless and ___rags at that time.
| A．by; in | B．on; in | C．at; by | D．in; in |
He will have learned English for eight years by the time he _____ from the university next year.
| A．will graduate | B．will have graduated | C．graduates | D．is to graduate |
—Could you spare me one minute, Bob? I have a favor to ask you.
—_____.
| A．It’s a pleasure | B．Go ahead | C．Help yourself | D．Ask, please |
The world was deeply ________ with the Green Olympics held in China in 2008.
| A．encouraged | B．offered | C．impressed | D．covered |
The students were ________ over the ________ problem，listening to the teacher with a ________ expression on their faces.
| A．puzzled；puzzling；puzzling | B．puzzled；puzzling；puzzled |
| C．puzzling；puzzling；puzzled | D．puzzling；puzzled；puzzling |
The two sides have reached a partial agreement, but several differences still ________ between them.
| A．happen | B．exist | C．survive | D．appear |